In Harpoon Advanced Naval Warfare, playing the EC2000 scenarios I have a plane loadout that uses TALD. I know what these are but have forgotten what command keys I need to use to fire the decays. I cannot find them anywhere in the manual. Please help. Many thanks.

I assume you are playing HC (HUCE/HCE/Harpoon Commander's Edition). You fire the decoys against targets like bases and ships mainly to soak up SAMs. This is identical to firing weapons, they are just a weapon that does no damage.

In Harpoon Advanced Naval Warfare, playing the EC2000 scenarios I have a plane loadout that uses TALD.

Since you own the Harpoon Advanced Naval Warfare, you might want to try some of the EC2000 scenarios under the Harpoon 3 game engine to see how they perform differently. You can find the scenarios within the PlayersDB.